Apache Kerby has a bypass the Kerberos pre-authentication check

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

• CISA KEV Not listed.
• EPSS 0.0053, the 44th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

1. 26 Jun 2026, 15:32 UTC Confirmed by GitHub Advisory Database

Sources

• GitHub Advisory Database: GHSA-262p-fj3f-xh7v
• OSV: GHSA-262p-fj3f-xh7v
• nvd.nist.gov/vuln/detail/CVE-2026-57915
• lists.apache.org/thread/1y3glgh3kzwoxo5m2lq504cjlh1dsrfh
• www.openwall.com/lists/oss-security/2026/06/26/8
• access.redhat.com/security/cve/CVE-2026-57915
• bugzilla.redhat.com/show_bug.cgi?id=2493407
• security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-57915.json
• github.com/apache/directory-kerby/commit/995fa59fac53f8e2e6fb987e0e29a5ae3a4bbf38
• github.com/apache/directory-kerby/releases/tag/kerby-all-2.1.2
• github.com/advisories/GHSA-262p-fj3f-xh7v

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.